/sys$common/syshlp/helplib.hlb SET, TERMINAL, Qualifiers, /CRFILL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /CRFILL[=fill-count]

    Generates the specified number of null characters after each
    carriage return before transmitting the next meaningful character
    (to ensure that the terminal is ready for reception). The value
    must be an integer in the range 0 to 9. The default is the
    /CRFILL=0 qualifier.